linux-phytec-fsl

spi: mediatek: update document devicetree bindings to fix syntax error

This patch updates document devicetree bindings
to fix syntax error.

Signed-off-by: Leilk Liu <leilk.liu@mediatek.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>